一：IS08583包介紹：

ISO8583包（簡稱8583包）是一個(gè)國際標(biāo)準(zhǔn)的包格式，最多由128個(gè)字段域組成，每個(gè)域都有統(tǒng)一的規(guī)定,，并有定長與變長之分,。
8583包前面一段為位圖,，用來確定包的字段域組成情況。其中位圖是8583包的靈魂,，它是打包解包確定字段域的關(guān)鍵,， 而了解每個(gè)字段域的屬性則是填寫數(shù)據(jù)的基礎(chǔ)。

1：位圖說明：

位置：在8583包的第1 位
格式：定長 
類型：B16（二進(jìn)制16位,，16*8=128bit） 
描述： 
如將位圖的第一位設(shè)為'1'，表示使用擴(kuò)展位圖（128個(gè)域），否則表示只使用基本位圖（64個(gè)域）,。 
如使用某數(shù)據(jù)域,，應(yīng)在位圖中將相應(yīng)的位設(shè)位'1',，如使用41域,，需將位圖的41位設(shè)為'1',。 
選用條件：如使用65到128域，需設(shè)位圖域第一位為'1' 
2：域的定義： 
typedef struct ISO8583 
{ 
int bit_flag; /*域數(shù)據(jù)類型0 -- string, 1 -- int, 2 -- binary*/ 
char *data_name; /*域名*/ 
int length; /*數(shù)據(jù)域長度*/ 
int length_in_byte;/*實(shí)際長度（如果是變長）*/ 
int variable_flag; /*是否變長標(biāo)志0：否 2：2位變長, 3：3位變長*/ 
int datatyp; /*0 -- string, 1 -- int, 2 -- binary*/ 
char *data; /*存放具體值*/ 
int attribute; /*保留*/ 
} ISO8583;

二：定義BitMap類

類說明：根據(jù)ISO8583 包的域定義,，定義BitMap類存儲每個(gè)域的信息,。例如：

package com.lottery.pos.model;

public class BitMap {
private int bit; //位
private int bittype; //數(shù)據(jù)類型 1 ascii 2 binary
private int variable; //是否變長0 不是 2 兩位變長 3 三位變長
private int len; //數(shù)據(jù)長度
private byte[] dat; //數(shù)據(jù)

public int getBit() {
return bit;
}
public void setBit(int bit) {
this.bit = bit;
}
public int getBittype() {
return bittype;
}
public void setBittype(int bittype) {
this.bittype = bittype;
}
public int getVariable() {
return variable;
}
public void setVariable(int variable) {
this.variable = variable;
}
public byte[] getDat() {
return dat;
}
public void setDat(byte[] dat) {
this.dat = dat;
}
public int getLen() {
return len;
}
public void setLen(int len) {
this.len = len;
}

}

三：定義PortConfig類

類說明：定義配置信息類。根據(jù)此類解析和封裝數(shù)據(jù),。例如：

package com.lottery.pos.model;

public class PortConfig {
/**
* 存放所有接口的配置信息
* [][0] bit 位:在Map中的位
* [][1] type 類型:1 ascii 2 binary
* [][2] len 長度:(對定長有效)
* [][3] varLen 變長:0非變長 2位變長 3位變長
*/
// 定義一個(gè)二位數(shù)組存放配置信息,。
public static final int[][] config= { 
{11,1,6,0}, 
{12,1,6,0},
{13,1,4,0}, 
{32,1,11,0},
{37,1,12,0},
{39,1,2,0},
{40,2,50,2},
{41,1,8,0},
{48,1,52,3},
{120,2,128,3},
};

｝

四：定義BitMapiso類

類說明：此類提供解析請求包和封裝信息包兩個(gè)方法，例如：

package com.lottery.pos.utils;

import java.util.ArrayList;
import java.util.List;

import com.lottery.pos.model.BitMap;

public class BitMapiso {

/**
* 解析請求包
* @param body
* @param config
* @return List
*/
@SuppressWarnings("unchecked")
public static List unpackRequest(byte[] body, int[][] config) {
List outList = new ArrayList();
// 取得除信息類型以外的包信息,。也就是取得位圖的初始位置,。
byte[] realbody = new byte[body.length - 4];
System.arraycopy(body, 4, realbody, 0, realbody.length);
// 取得位圖
byte[] map = null;
byte[] map8 = new byte[8];
System.arraycopy(realbody, 0, map8, 0, 8);
boolean[] bmap8 = LoUtils.getBinaryFromByte(map8);
if (bmap8[1]) {
// 如果第一位為1，則是可擴(kuò)展位圖,，設(shè)為16字節(jié)長度,。
map = new byte[16];
System.arraycopy(realbody, 0, map, 0, 16);
} else {
map = map8;
}
boolean[] bmap = LoUtils.getBinaryFromByte(map);

int tmplen = map.length;
for (int i = 2; i < bmap.length; i++) {
if (bmap[i]) {
//BitMap bitMap = null;
// 尋找位圖中的1對應(yīng)的數(shù)據(jù)
int bit=-1;
for (int j = 0; j < config.length; j++) {
if (config[j][0] == i) {
bit=j;
break;
}
}
BitMap outBitMap = new BitMap();
outBitMap.setBit(i);
outBitMap.setBittype(config[bit][1]);
//len對變長是無用的。
outBitMap.setLen(config[bit][2]);
outBitMap.setVariable(config[bit][3]);
byte[] nextData = null;
if (config[bit][3] > 0) {
//取出變長部分的值,。
int varLen = config[bit][3];
if (config[bit][1] == 2) {
varLen = varLen - 1;
}
byte[] varValue = new byte[varLen];
System.arraycopy(realbody, tmplen, varValue, 0, varValue.length);
int datLen = 0;
if (config[bit][1] == 2) {
datLen = LoUtils.bcdToint(varValue);
} else {
datLen = byteToInt(varValue);
}

tmplen += varLen;
// 取出變長部分后帶的值,。
nextData = new byte[datLen];

System.arraycopy(realbody, tmplen, nextData, 0,nextData.length);
tmplen += nextData.length;
} else {
nextData = new byte[config[bit][2]];
System.arraycopy(realbody, tmplen, nextData, 0,nextData.length);
tmplen += config[bit][2];
}
outBitMap.setDat(nextData);
outList.add(outBitMap);
}
}

return outList;
}

/**
* 打包響應(yīng)包,不包括消息類型
* @param list
* @return byte[]
*/
@SuppressWarnings("unchecked")
public static byte[] PackResponse(List list) {
int len = 16;
for (int i = 0; i < list.size(); i++) {
BitMap bitMap = (BitMap) list.get(i);
// 計(jì)算請求包總長度
if (bitMap.getBittype() == 2) {
if (bitMap.getVariable() > 0) {
len += bitMap.getVariable() - 1 + bitMap.getDat().length;
} else {
len += bitMap.getVariable() + bitMap.getDat().length;
}
} else {
len += bitMap.getVariable() + bitMap.getDat().length;
}
}
byte[] body = new byte[len];
// 位圖
boolean[] bbitMap = new boolean[129];
bbitMap[1] = true;
int temp = (bbitMap.length - 1) / 8;
for (int j = 0; j < list.size(); j++) {
BitMap bitMap = (BitMap) list.get(j);
bbitMap[bitMap.getBit()] = true;
byte[] bitmap = LoUtils.getByteFromBinary(bbitMap);
System.arraycopy(bitmap, 0, body, 0, bitmap.length);
// 數(shù)據(jù)
if (bitMap.getVariable() > 0) {
// 數(shù)據(jù)是可變長的:拼變長的值
byte[] varValue = null;
if (bitMap.getBittype() == 2) {
varValue = LoUtils.StrToBCDBytes(String.format("%0"+ bitMap.getVariable() + "d",bitMap.getDat().length));
} else {
varValue = String.format("%0" + bitMap.getVariable() + "d",bitMap.getDat().length).getBytes();
}
System.arraycopy(varValue, 0, body, temp, varValue.length);
temp += varValue.length;
// 拼變長部分后所帶的數(shù)的值。
System.arraycopy(bitMap.getDat(), 0, body, temp, bitMap.getDat().length);
temp += bitMap.getDat().length;
} else {
// 數(shù)據(jù)是固定長度的,。
byte dat[] =new byte[bitMap.getLen()];
if (bitMap.getDat().length!=bitMap.getLen()){ 
System.arraycopy(bitMap.getDat(), 0, dat, 0, bitMap.getLen());
}else{
dat=bitMap.getDat();
} 
System.arraycopy(dat, 0, body, temp, dat.length);
temp += bitMap.getDat().length;
}
}
return body;
}

｝

package com.lottery.utils;

import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;

import javax.servlet.http.HttpServletRequest;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

/**
* 編碼與數(shù)據(jù)類型類
* 
* @author LLH
*/
public class LoUtils
{
private static BASE64Encoder encoder = new BASE64Encoder ();
private static BASE64Decoder decoder = new BASE64Decoder ();

/**
* BASE64 編碼
* 
* @param s
* @return
*/
public static String encodeBufferBase64(byte [] buff)
{
return buff == null ? null : encoder.encode (buff);
}

/**
* BASE64解碼
* 
* @param s
* @return
*/
public static byte [] decodeBufferBase64(String s)
{
try
{
return s == null ? null : decoder.decodeBuffer (s);
}catch (IOException e)
{
e.printStackTrace ();
}
return null;
}

/**
* BASE64 字節(jié)數(shù)組編碼
* 
* @param s
* @return String
*/
public static String encodeBase64(byte [] s)
{
if(s == null)
return null;
String res = new BASE64Encoder ().encode (s);
res = res.replace ("\n","");
res = res.replace ("\r","");
return res;
}

/**
* BASE64解碼
* 
* @param s
* @return
*/
public static byte [] decodeBase64(byte [] buff)
{
if(buff == null)
return null;
BASE64Decoder decoder = new BASE64Decoder ();
try
{
byte [] b = decoder.decodeBuffer (new String (buff));

return b;
}catch (Exception e)
{
return null;
}
}

/**
* 將reauest里的數(shù)據(jù)包轉(zhuǎn)成字符串
* 
* @param request
* @return String
*/
public static String getRequestBodyTxt(HttpServletRequest request)
{
// 接收手機(jī)傳過來的參數(shù)
BufferedInputStream bufferedInputStream = null;
// 此類實(shí)現(xiàn)了一個(gè)輸出流,，其中的數(shù)據(jù)被寫入一個(gè)字節(jié)數(shù)組
ByteArrayOutputStream bytesOutputStream = null;
String body = null;
try
{

// BufferedInputStream 輸入流
bufferedInputStream = new BufferedInputStream (
request.getInputStream ());
bytesOutputStream = new ByteArrayOutputStream ();
// 寫入數(shù)據(jù)
int ch;
while ((ch = bufferedInputStream.read ()) != -1)
{
bytesOutputStream.write (ch);
}
// 轉(zhuǎn)換為String類型
body = new String (bytesOutputStream.toByteArray (),"UTF-8");
}catch (Exception ex)
{
ex.printStackTrace ();
}
finally
{
// 關(guān)閉此輸入流并釋放與該流關(guān)聯(lián)的所有系統(tǒng)資源。
try
{
bytesOutputStream.flush ();
bytesOutputStream.close ();
bufferedInputStream.close ();
}catch (IOException e)
{
e.printStackTrace ();
}
}
return body;
}

/**
* 將reauest里的數(shù)據(jù)包轉(zhuǎn)成字節(jié)數(shù)組
* 
* @param request
* @return
*/
public static byte [] getRequestBodyByte(HttpServletRequest request)
{
// 接收手機(jī)傳過來的參數(shù)
BufferedInputStream bufferedInputStream = null;
// 此類實(shí)現(xiàn)了一個(gè)輸出流,，其中的數(shù)據(jù)被寫入一個(gè)字節(jié)數(shù)組
ByteArrayOutputStream bytesOutputStream = null;
byte [] body = null;
try
{
// BufferedInputStream 輸入流
bufferedInputStream = new BufferedInputStream (
request.getInputStream ());
bytesOutputStream = new ByteArrayOutputStream ();
// 寫入數(shù)據(jù)
int ch;
while ((ch = bufferedInputStream.read ()) != -1)
{
bytesOutputStream.write (ch);
}
// 轉(zhuǎn)換為String類型
body = bytesOutputStream.toByteArray ();
}catch (Exception ex)
{
ex.printStackTrace ();
}
finally
{
// 關(guān)閉此輸入流并釋放與該流關(guān)聯(lián)的所有系統(tǒng)資源,。
try
{
bytesOutputStream.flush ();
bytesOutputStream.close ();
bufferedInputStream.close ();
}catch (IOException e)
{
e.printStackTrace ();
}
}
return body;
}

public static String getEigthBitsStringFromByte(int b)
{
// if this is a positive number its bits number will be less
// than 8
// so we have to fill it to be a 8 digit binary string
// b=b+100000000(2^8=256) then only get the lower 8 digit
b |= 256; // mark the 9th digit as 1 to make sure the string
// has at
// least 8 digits
String str = Integer.toBinaryString (b);
int len = str.length ();
return str.substring (len - 8,len);
}

public static byte getByteFromEigthBitsString(String str)
{
// if(str.length()!=8)
// throw new Exception("It's not a 8 length string");
byte b;
// check if it's a minus number
if(str.substring (0,1).equals ("1"))
{
// get lower 7 digits original code
str = "0" + str.substring (1);
b = Byte.valueOf (str,2);
// then recover the 8th digit as 1 equal to plus
// 1000000
b |= 128;
}
else
{
b = Byte.valueOf (str,2);
}
return b;
}

/**
* 將一個(gè)16字節(jié)數(shù)組轉(zhuǎn)成128二進(jìn)制數(shù)組
* 
* @param b
* @return
*/
public static boolean [] getBinaryFromByte(byte [] b)
{
boolean [] binary = new boolean [b.length * 8 + 1];
String strsum = "";
for (int i = 0;i < b.length;i++ )
{
strsum += getEigthBitsStringFromByte (b [i]);
}
for (int i = 0;i < strsum.length ();i++ )
{
if(strsum.substring (i,i + 1).equalsIgnoreCase ("1"))
{
binary [i + 1] = true;
}
else
{
binary [i + 1] = false;
}
}
return binary;
}

/**
* 將一個(gè)128二進(jìn)制數(shù)組轉(zhuǎn)成16字節(jié)數(shù)組
* 
* @param binary
* @return
*/
public static byte [] getByteFromBinary(boolean [] binary)
{

int num = (binary.length - 1) / 8;
if((binary.length - 1) % 8 != 0)
{
num = num + 1;
}
byte [] b = new byte [num];
String s = "";
for (int i = 1;i < binary.length;i++ )
{
if(binary [i])
{
s += "1";
}
else
{
s += "0";
}
}
String tmpstr;
int j = 0;
for (int i = 0;i < s.length ();i = i + 8)
{
tmpstr = s.substring (i,i + 8);
b [j] = getByteFromEigthBitsString (tmpstr);
j = j + 1;
}
return b;
}

/**
* 將一個(gè)byte位圖轉(zhuǎn)成字符串
* 
* @param b
* @return
*/
public static String getStrFromBitMap(byte [] b)
{
String strsum = "";
for (int i = 0;i < b.length;i++ )
{
strsum += getEigthBitsStringFromByte (b [i]);
}
return strsum;
}

/**
* bytes轉(zhuǎn)換成十六進(jìn)制字符串
* 
* @param b
* @return
*/
public static String byte2HexStr(byte [] b)
{
String hs = "";
String stmp = "";
for (int n = 0;n < b.length;n++ )
{
stmp = (Integer.toHexString (b [n] & 0XFF));
if(stmp.length () == 1)
hs = hs + "0" + stmp;
else
hs = hs + stmp;
}
return hs.toUpperCase ();
}

private static byte uniteBytes(String src0, String src1)
{
byte b0 = Byte.decode ("0x" + src0).byteValue ();
b0 = (byte) (b0 << 4);
byte b1 = Byte.decode ("0x" + src1).byteValue ();
byte ret = (byte) (b0 | b1);
return ret;
}

/**
* 十六進(jìn)制字符串轉(zhuǎn)換成bytes
* 
* @param src
* @return
*/
public static byte [] hexStr2Bytes(String src)
{
int m = 0, n = 0;
int l = src.length () / 2;
byte [] ret = new byte [l];
for (int i = 0;i < l;i++ )
{
m = i * 2 + 1;
n = m + 1;
ret [i] = uniteBytes (src.substring (i * 2,m),
src.substring (m,n));
}
return ret;
}

/**
* 將String轉(zhuǎn)成BCD碼
* 
* @param s
* @return
*/
public static byte [] StrToBCDBytes(String s)
{

if(s.length () % 2 != 0)
{
s = "0" + s;
}
ByteArrayOutputStream baos = new ByteArrayOutputStream ();
char [] cs = s.toCharArray ();
for (int i = 0;i < cs.length;i += 2)
{
int high = cs [i] - 48;
int low = cs [i + 1] - 48;
baos.write (high << 4 | low);
}
return baos.toByteArray ();
}

/**
* 將BCD碼轉(zhuǎn)成int
* 
* @param b
* @return
*/
public static int bcdToint(byte [] b)
{
StringBuffer sb = new StringBuffer ();
for (int i = 0;i < b.length;i++ )
{
int h = ((b [i] & 0xff) >> 4) + 48;
sb.append ((char) h);
int l = (b [i] & 0x0f) + 48;
sb.append ((char) l);
}
return Integer.parseInt (sb.toString ());
}

/**
* 輸出調(diào)試信息
* 
* @param str
*/
public static void trace(String str)
{
// System.out.println ("["
// + (new SimpleDateFormat ("yyyy-MM-dd HH:mm:ss.S")).format (new Date ())
// + "]>" + str);
}
}

源代碼測試沒有問題。